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.(No Model.)

- J. B. CORNWALL.-

' PACKING AUGER. No. 604.971) 1 I Patented May 31,1898.

II V:

' UNITED STATE PATENT Frrcn.

JOHN B. CORNWALL, OF MOLINE, ILLINOIS, ASSIGNOR TO THEjBARNARD dz LEASMANUFACTURING COMPANY, OF SAME PLACE.

PACKINGI-AUGER,

SPECIFICATION forming part'of Letters Patent No. 604,971, dated May 31,1898.

Application filed January 27, 18 98. Serial No. 668,216: (No model.)

To all whom it may concern:

Be it known that 1, JOHN B. CORN WALL, o Moline, in the county of RockIsland and State of Illinois, have invented certain new and use fulImprovements in Packing-Angers; and I hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, which form part of this specification.

This invention is an improved packing screw or auger for machines forpacking bran, hulls, and various materials in bags, barrels, &o.; andits objects are to improve the construction of the auger so that thepressure of the compressed material will be equalized on both sides ofthe auger, and the workingcapacity of the auger increased so that itwill pack faster than the angers heretofore known and will be especiallyadapted for packing light and fluffy material and which will hold thematerial more certainly under the auger.

. These objects are attaihed by the novel confacesto one feed-opening.

struction of the auger hereinafter described and claimed, andillustrated in-the accompanying drawings, in which- Figure 1 is a topperspective, View of the auger. Fig. 2 is a bottom perspective view ofthe same; and Fig. 3 is a detail sectional View of a packer, showing aside view of the auger, looking toward the mouth thereof.

It will be observed that ,my improved auger, as shown, is of the singlespiral type and has but one opening or mouth for the material to feedunder it and that the upper side of the auger has preferably but asingle incline, the first or upper half of which is preferably ofslightly-greater pitch than the sec- 0nd or under half. The packing orunder side of the auger, however, has two or more inclines orpacking-surfaces,two being shown, and the lower edge of the firstincline is diametrically opposite the lower end of the spiral or secondincline. Thus the auger, as shown, has two packing-faces, but dnly onefeedopening. This is the peculiar feature of the invention, to wit: aplurality of packing-sur- Further, it is highly desirable that thepacking-surfaces should be so disposed that they counterbalance orcounteract each other, and thus prevent lateral displacement of theauger or its shaft by reason of unequal pressure on one side, as wouldbe the caseif the packing-surfaces were so disposed that the compressionwas wholly or principally at one side of the auger or shaft.

I 'will r w describe the particular auger shown in the drawings.

Referring to the drawings by letters, A designates a packing-augerformed of a single spiral blade, having a central hub 13 for itsattachment to the packing-shaft and a single feed opening or mouth 0 atone side of the hub between the ends of the spiral. The upper surface ofthe auger is inclined from the upper edge of the mouth to the bottomthereof, the incline being greater between the points a and Z) on thefirst or upper half of the auger and less between the points I) and c onthe lower or second half thereof.

Directly opposite the mouth 0 on the under side of the auger is ashoulder D, and the under surface of the auger is tapered from the partA to the lower edge I) of shoulder D, forming the first packing-surfaceE, the lower edge of the rib D being in the same plane as the lower edgeof mouth 0.

The increased pitch of the lower edge of the surface of the augerbetween the points a and b necessitates a thickening of the metal in theauger-blade between these points. The remaining under portion of theblade between the upper edge of shoulder D and the lower edge of mouth 0forms a second packing-sursurface F. I g

It will be observed that the packing-sun faces E and F are diametricallyopposed and the upward pressure of the material against the auger isgreatest at the lowest termini of the parts E and F, which are alsodiametrically opposite, so that the tendency of the upward pressure ofthe compressed material is equalized or counterbalanced and the augerand shaft not displaced laterally.

By having the upper surface of the auger between the points at b steeperthan the portions between I) and c the material is allowed to settledown slightly in front of the opening 0, and by the double inclines EandF on the lower or pressure side of the auger the material is presseddown slightly twice in each revolution, the pressure at all times beingperfectlycounterbalanced. Asingle spiralfacilitates the feeding of lightor spongy material.

A single spiral auger without the double packing-surfaces on its lowerside would dofleet the shaft to which the anger is attached from itscentral position and cause it to revolve in an eccentric manner onaccount of the pressure being all on one side of the auger and eccentricto the shaft. This tendency to deflect the shaft is overcome in myinvention by reason of the second packing-surface I and the primarypacking-surface E on the bottom of the auger.

lVith the auger constructed as shown about double the amount of materialcan be packed in a given time than could be packed by the ordinarydouble-mouth augers, and at the same time I can pack the material moresolidly, because with my auger the light and fluffy material which is tobe packed will have time to settle down slowly through the tube in whichthe auger is operated more compactly in front of the mouth 0. Thus theauger has a steady and constantfeed instead of an interrupted and-uncertain feed and holds the material more positively, as there is butone opening in the entire auger through which the material can bulge orspring back.

The material is obviously packed more firmly, because each layer isrepeatedly pressed instead of being simply packed down once and then anew layer of material placed thereover. The primary packing-surface Efirst compresses the material, which is then allowed to slightly expand,and then is a second time compressed by the secondarypacking-surface F.

This packing-auger may be used in connection with packing-machines suchas are shown in Patent No. 173,882, of February 22, 1876, for example,the packer being attached to the lower end of a rotating shaft I, whichis operated by any suitable means, and compressing the material within atube G, which may be mounted upon a movable platform, as shown in saidpatent.

Having thus described my invention, what I therefore claim as new, anddesire to secure by Letters Patent thereon, is

1. A rotary packing-auger having a packing-blade provided with aplurality of packing-surfaces on its under side substantially asdescribed.

2. A packing-auger having a spirally-inclined packing-blade, providedwith a secondary packing surface on its under side intermediate itsends, substantially as described.

3. A rotary packing-auger consisting of a single spiral having afeed-opening at one side only and aplurality of packing-surfaces on itsunder side substantially as described.

4. A single continuous spiralpacking-auger having two packing-surfaceson its under face, the lower edges of said surfaces being diametricallyopposed, substantially as described.

5. A packing-auger having a single incline on its upper face and aplurality of packingsurfaces on its under face, substantially as and forthe purpose described.

(5. A packing-auger having a single incline 011 its upper face and aplurality of packingsurfaces on its under face and only one feedmouth,substantially as and for the purpose described.

7. A packing-auger havingasingle incline on its upper face,diametrically opposite packing-surfaces on its under face, and onefeedmouth, substantially as and for the purpose described.

8. The combination of the packing-tube and a rotary shaft; withasingle-mouth spiral packing-auger on said shaft having a single incline011 its upper face and two inclines or packing-surfaces on its lowerface, substantially as described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

JOHN B. CORNWALL.

Witnesses:

J. SILAS LEAS, IDA M. MAOBETH.

